Exhibited muscular power estimating apparatus

A muscular strength estimation device for estimating muscular strength, comprising:

• load supply means for applying a prescribed exercise load to a subject;
• oxygen saturation measuring means for measuring, while said exercise load is being applied to said subject, oxygen saturation in the blood circulating through the muscle to which said exercise load is applied;
• minimum value detection means for detecting said oxygen saturation minimum value during measurement;
• recording means for recording in advance the minimum oxygen saturation when said subject was exerting maximum muscular strength;
• and
• calculation means for calculating muscular strength when said prescribed load is applied, using the oxygen saturation before an exercise load is applied to said subject, said oxygen saturation minimum value that has been detected, and said minimum oxygen saturation recorded by said recording means.